rust-lang / rust-lang/rfcs

Expose a stable way to use the `breakpoint` intrinsic.

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Description

The ability to insert breakpoints directly in code rather than from a debugger can be handy sometimes, and it would be a shame to lose this capability in stable Rust just because the breakpoint intrinsic is unstable.

Some suggestions:

  • Stabilize the intrinsic itself
  • Create a stable #[inline(always)] wrapper function std::debug::breakpoint()

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First steps

  1. Read the whole issue, then the project's contributing guide.
  2. Comment on the issue to say you are picking it up — it saves two people doing the same work.
  3. Fork the repository and make your change on a branch.
  4. Open a pull request that references the issue number.

Research direction

The issue names no files, tests, or entry points. Start by comparing its two proposed approaches—stabilizing the intrinsic or adding std::debug::breakpoint()—and determine which stable API the project should adopt. Done means a resolved design with an agreed stable way to insert breakpoints in Rust code.

Written by the indexing model from the issue text.

Assessment

Tech stack
rust
Domain
devtools
Issue type
Feature
Difficulty
5/5
Estimated time
Over a week
Activity status
Stale
Clarity
Needs clarification
Newbie friendliness
25/100

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